首页->2024一级建造师资格模拟
(A)先下游排孔,后上游排孔,最后中间排孔
(B)先中间腓孔,后下游排孔,最后上游排孔
(C)先下游排孔,后中间排孔,最后上游排孔
(D)先上游排孔,后中间排孔,最后下游排孔